Fixes creating files templated/generated by entrypoint

Description

Fixes setting STATIC_URL and RUNTIME_ENV_FILE
Fixes setting PUBLIC_URL for compiled js files

Fixes # (issue)

Type of change

Bug fix (non-breaking change which fixes an issue)
New feature (non-breaking change which adds functionality)
Breaking change (fix or feature that would cause existing functionality to not work as expected)
This change requires a documentation update

How Has This Been Tested?

[ ] Local Pre-commit Checks
[ ] CI/CD Build

Checklist

[ ] My code follows the style guidelines of this project
[ ] I have performed a self-review of my own code
[ ] My changes generate no new warnings
[ ] If applicable - I have commented my code, particularly in hard-to-understand areas
[ ] If applicable - I have made corresponding changes to the documentation
[ ] If applicable - I have added tests that prove my fix is effective or that my feature works
[ ] If applicable - New and existing unit tests pass locally with my changes
[ ] Any dependent changes have been merged and published in downstream modules

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 98.61%. Comparing base (aca5ad8) to head (87d9d6d).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## v1.1.0 #622 +/- ## ========================================== + Coverage 98.54% 98.61% +0.07% ========================================== Files 76 76 Lines 2745 2745 Branches 415 415 ========================================== + Hits 2705 2707 +2 + Misses 40 38 -2 ``` | [Flag](https://app.codecov.io/gh/esgf2-us/metagrid/pull/622/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=esgf2-us) | Coverage Δ | | |---|---|---| | [backend](https://app.codecov.io/gh/esgf2-us/metagrid/pull/622/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=esgf2-us) | `100.00% <ø> (ø)` | | | [frontend](https://app.codecov.io/gh/esgf2-us/metagrid/pull/622/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=esgf2-us) | `97.93% <ø> (+0.10%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=esgf2-us#carryforward-flags-in-the-pull-request-comment) to find out more.

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esgf2-us / metagrid